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getResourceAsStream returns null
I'm loading a text file from within a package in a compiled JAR of my Java project. The relevant directory structure is as follows:
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Error: This Android SDK requires Android Developer Toolkit version 22.6.1 or above
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Now at start of ADT i got parseSdkContent failed java.lang.NullPointerException
– Ernest
Mar 24 '14 at 8:06
1
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Enum “Inheritance”
...meValue) ...
However, there is a class based solution of the old days of Java, when there were no enums available. This provides an almost enum-like behaviour. The only caveat is that these constants cannot be used within a switch-statement.
public class MyBaseEnum
{
public static readonly My...
Safe integer parsing in Ruby
...ke Myron's answer but it suffers from the Ruby disease of "I no longer use Java/C# so I'm never going to use inheritance again". Opening any class can be fraught with danger and should be used sparingly, especially when it's part of Ruby's core library. I'm not saying don't ever use it, but it's usu...
Passing enum or object through an intent (the best solution)
...um<T>> Intent.putExtra(victim: T): Intent =
putExtra(T::class.java.name, victim.ordinal)
inline fun <reified T: Enum<T>> Intent.getEnumExtra(): T? =
getIntExtra(T::class.java.name, -1)
.takeUnless { it == -1 }
?.let { T::class.java.enumConstants[it] }
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Virtual functions and performance - C++
...l methods are virtual) is the primary language for the iPhone and freakin' Java is the main language for Android, I think it's pretty safe to use C++ virtual functions on our 3 GHz dual-core towers.
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xpath find if node exists
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A variation when using xpath in Java using count():
int numberofbodies = Integer.parseInt((String) xPath.evaluate("count(/html/body)", doc));
if( numberofbodies==0) {
// body node missing
}
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Timertask or Handler
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Handler is better than TimerTask.
The Java TimerTask and the Android Handler both allow you to schedule delayed and repeated tasks on background threads. However, the literature overwhelmingly recommends using Handler over TimerTask in Android (see here, here, he...
IntelliJ IDEA: Running a shell script as a Run/Debug Configuration
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Alas, if a java debug configuration uses a shell script in "Run Another Configuration", then only the shell script is started. The debug session isn't.
– Auric
Sep 23 '19 at 12:21
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How to get the unique ID of an object which overrides hashCode()?
When a class in Java doesn't override hashCode() ,
printing an instance of this class gives a nice unique number.
10 Answ...